Flushing valve



l tinued at the will of the individual by con-` Patented Sept.- 27, 1,927.

UNITEDA STATES 1,643,560 PATENT OFFICE;

ARTHUR ,TACOBSON AND ALEXANDER L. OGILVE, OF SAN FRANCISCO, CALIFORNIA.-

FLSHIN G VALVE.

Application med May 1s, 1925'. serial No. s'oos.

This invention relates tol flushing valves in general, but more ,particularly to those designed and intended for toilet flushing purposes where the flushing Huid may be either a gauged charge orV a flushing continued pressure upon the push button of the valve.

The valve shown and describedin this application is an improved'form of push button valve, designed primarily as an improvement over that shown and described in our co-pending application tiled February 24. 1925, Serial No. 10,993. It will be noted that severa-l improvements have been added, such as' a 'leak proof auxiliary valve stem, a non-metallic, non-corrodible element in connection with the guide member and a non-corrodible strainer in the inlet porty l opening leading to the auxiliary valve chamber.v

Primarily, an object of our invention is the provision of a balanced valve of the push but-ton. type for use in connection with toilets, urinals andvsuch-like lavatory vadjuncts that` shall be of simple and cheapconstruction, durable, of highest elticiency, and certain parts of which are constructedv of a non-corrodible material, thereby both eliminating wear rand reducing to a minimum hammerino' or pounding of these parts.

Other objects of this invention will ap-v pear in the following description thereof, reference being had to the accompanying drawings forming a part of this specifica-V tion and wherein like reference characters indicate corresponding parts, throughout.

Referring to the drawings:

l Figure 1 is a vertical medial section of our valve, showing the `main slidable noncorrodible v alve member andthe auxiliary valve in their closed, or seatedpositions, also thevalve stem housing and leakv proof diaphragm, attached to and operable `with-V `the stem of the push button mechanism,

Figure 2 is a plan section Ytaken on the line 2-2 of Figure 1, showing .the valve stem housing, diaphragm and the integrally formed, auxiliary valve chamber housing and the inlet and outlet port-s formed in this housing.'

Figure 3 is an elevation of the vmain slidable valve' member. showing' the severalA exhaust openings as positioned vin the .shell wall adjacent the upper edge thereof, and the non-metallic covering, such as hard rub- 1 represents the valve shell or housinf` proper, comprised ,of anouter oylindrica 'member having an inlet opening 2, a discharge opening 3, and an integrally formedv i I valve barrel 4. forming a main pressure` cliamber, within the body of the shell for housing of the valve proper-' the upper end of the cylindrical member 1 being open and forming an annular seat 6 adapted to seat ah pliable diaphragm 7 of ordinary construc-A tion; 8 a diaphragm cap -member provided with an annular seat 9,r corresponding4 to the seat 6,`and adapted to fit overthe upper edge of the diaphragm 6, forming therewith an auxiliary pressure chamber 10; l1 theY integrally formed lvalve stem housing y,ex-'

tending upwardly 'froml `the cap 4member v8 and having a seat 12., -at its upper end,A

adapted to receive a pliable diaphragm 13, held in place by a shouldered screw 'cap 14,;

15 the outsidecover `orhousing cap, intef riorly threaded at its lower edge'16 to itthe exteriorly threaded upper end 17 of the cylindrical body f1, Vand-provided with an internal Vshoulder 18 adapted to fit snugly uponV theA upper edge of the diaphragm cap member 8, so that the outside cover 15 may be screwed tightly home to clamp the dia? phragm 7 between thebody seat 6 and the diaphragm cap seat 12. `Y

The' mainslidable piston valve member 19 is comprisedof a cylindrical shell. open at its lower end and closedat its upper end` 20, the whole outer surface being provided. with a coating21 of a non-corrodible material, such as vulcanized hard rubber, or. it may be molded in its entirety of vulcanized hardrubber. As shown yinFigures 1 and 3 ofthe drawings. the shell 19 has been enclosed in a coating 21, extending over the top l2O and under the lower edge as at 22 and 23,' to securely bind it to the metallic wall ot' the shell, the whole being finished to form a sliding fit within a cylinder 24a` fitted tightly within the bore 24 of theV valve barrel 4, the said cylinder being provided with an interior coating 24 of hardr rubber as a working surface adapted to contact the working surface 21 of the main valve V19, thereby providing non-corrodible contacting surfaces for both these members. The upper end 20, of the valve member 19 being provided with a head 25k having a reduced neck 26, forming a diaphragm seat 27, with the neck 26 extending through a centrally positioned opening 28 formed in the diaphragm 7, the head 25 being centrally bored and tapped, as indicated at 29, to receive a clampnut 30 having an exteriorly threaded bo'ss 31 anda flanged member 32 adapted to clamp theI diaphragm 7 tightly against the seat 27 of the valve member 19, the under surface' 33 of the diaphragm, immediately adjacent the seat 27, being adapted to seat upon the upper edge 34 of the valve barrel 4 Y" The main valve member 19 is provided with a.v plurality of discharge openings 35 formed circumferentially of the valve shell and extending through the wall adjacent the upper end 20, and normally closed by the valve barrel ycylinder 241.v

' The diaphragm cap 8 is provided with a concentrically positioned bore 36 communieating with the valve stem housing 11, to receive the valve stem 37, which is provided with a push button 38, at its upper end adapted to extend through an opening 39 formed in the housing cap 15. The diaphragm 13V is provided with a central opening through which the valve stem 37 extends, said stem being screw threaded from its upper end to about midway to receive a pair ofvjam nuts 40 "and 41, between which thev diaphragm 13is centrally clamped. The lower end ofthe valve stem 37 is provided with an auxiliary valve member 42, having al recessed gasket 43, adapted to seat against the annular seat 44 formed on the under face ofthe diaphragm cap 8, the valve being held normally seated by the spring 45, surrounding'. the steni 37 between the recessed button 38, and the seat 46 formed in the cap 14, the spring urge tending` to force the stein upward and the gasket 43 against its seat 44,

The diaphragm cap bore 36 is provided with an annular groove 47, surrounding the stem 37 and adapted to communicate with a plurality of channels 48, formed in the stem adjacent the auxiliary valve member 42, the groove 47 also communicates with va by-pass port 49 formed, in the cap, which in turn communicates with ya registering opening 50, formed in the outer edge of the diaphragm 7 and a discharge port 51 extending from the seat 6 of the body 1 to the discharge 3, thereof, and 52 the inlet port, formed in the cap. 8 opposite lthe by-pass port 49, and communicating with the auxiliary pressure chamber 10 and the inlet opening 2 through the port .53 and strainer 54.

The strainer 54 is constructed 'of any suitable non-corrodible material, such as hard rubber and comprises a tubular member 55, having a flanged upper end Vadapted to seat in the counter-bore 56 formed in the l'lange 57 of the housing 1, the lower end of the member 55 being screw-threaded Jfor theV` reception of a perforated strainer cap 58.

The valve stem 37 is fitted in the bore 36 and forms a Yreasonably water tight fit be tween these parts, but if any leakage should occure between said parts'into the valve stem housing 11, during the operation of the valve, it will be expelled therefrom through the same channel and in to the exhaust port upon return action of the auxiliary valve, due to the expansion of the elastic air cushion within said valve stem housing.

The main valve 19 may be constructed of metal with a hard rubber coating as s liown, or it may be molded of solid hard rubber, but the construction shown is preferable 'as the metallic shell provides a base for the rubber coating and also reinforces the valve shell. By constructing this valve with a non-metallic coating, wear between the valve shell and inner surface of the cylinder 24lvl is greatly reduced, and hammering attendant upon the vibration of the shell is reduced to a minimum.

In operation, our valve,` Figure` l, is assumed to be under pressure and closedA with the pressure in the chamber 5, beneatli the diaphragm 7, balanced by an equal pressure in the auxiliary chamber 10, above the (gliaphragm 7, this equalization of pressures being brought about by means of the inlet port 52 being in communication with the main pressure chamber 5, the equilibriui'n thus established serving to retain seated bot-h main and auxiliary valves 19 and 42. Upon bringing pressure to bear upon the push button 38, the auxiliary valve member is unfseated, bringing the channels, or scores, 48 ol the stem 37 into communica-tion with the auxiliary pressul? chamber, thereby releasing the pressure rtherein through the groove 47 andfby-pass port` 49 to the discharge. lVith the pressure slightly lowered in this chamber, the normal pressure in the mainychamber 5 lifts the diaphragm'7, carrying upwardly with it the main piston valve 19, bringing, thereby, the'discharge openings 3510i said valve into` communication with the main pressure chamber 5, with the attendant exhaust there through of the V water from this chamber, through the Avalve 19, to the discharge 3, the flow continuing until pressureupon the push button 38 is released, upon which, through the action ot' the spring 45, the valve 42 seats, closing the auxiliary chambers exhaust port, permitting pressure to be gradually accumulated in this chamber until equal again to that normally.l

carried in chamber 5, with the accompanying result offorcing the valve 19 and diaphragm 7 down upon the seat 34 of the valve barrel l and bringing about conditions necessary to a following flushing operation. j

A most important feature of this invention residesin the character V of the sliding' the Vtendency to rattle and' pound attendantv upon wear of. these parts in practically all other well knownpbalanced valve ,construc-A tions. y Y

The importance of Icoating both main Valve and cylinder with hard rubber is paramount, for the reason that, it either orboth of thesev parts become liworn, they may bek renewed at slight expensein comparison to a renewal of the entire valve housing, as is the customary practice, in addition *to-providingnon-corrodible contacting'surtaces. f

Having thus described our invention, we claim, and desire to secure, by Letters Patent:

1. Ailushing valve comprising a housing having a main pressure chamberl and an auxiliary pressure chamber, a diaphragm between said chambers, a main piston valve in said main pressure chamber borne by said diaphragm, said main piston valve being comprised ofa shell having a non-metallic covering, an auxiliary valve in said auxiliary pressure chamber comprised of a springcontrolled, channeled valvek stem and valve member, a valve stem housing formed adjacent said auxiliary pressure chamber, a diaphragm in said chamber bearing said auxiliary valve stem, an inlet port communicating with the said auxiliary pressure chamber and said main pressure Ychamber and having a strainer positioned therein, said strainer' consisting of a non-corrodible nipple and perforated cap member and a bypass port communicating with said auxiliary pressure chamber and main valve dischargev and normally closed by said auxiliary valve member and opened by the movement of the valve stem thereof to bring said valve stem channels into register with the by-pass port.

2. In a valve construction, a housing having a main pressure chamber and an auxiliary pressure chamber, a diaphragm between said chambers, a main piston valve borne by said diaphragm, a valve barrelV formed 'integral with the valvevhousing and adapted to receive said piston valve, a valve stein housing communicating with-said auxiliary pressure chamber, a diaphragm in said valve stem housing, an axiliary valve in said auxiliary pressure chamber bearing a stem supportable by the said diaphragm and movable therewith, said stein being adjustable relative to said diaphragm and provided with channels therein, an inlet port communicating kwith said main and auxiliary chambers and a by-pass communicating charge Outlet, anda cushioning means With- -in said-valve steinhousing, the said valve stem diaphragm acting lupon said cushionwith said valve` stem channels and leading from. said. auxiliary ,chamber to Ythe dising means for its compression, or the Ae'xpul-v` f 4sion therefrom of .such leakage, as may entervr said ,valvestem housing duringthe operation oi said auxiliary valve. Y

3. 1n a iiushing valve, a housing having a main vpressure chamber and an auxiliary pressurek chamber, a ,diaphragm` gbetvveen;v

said chambers, a main piston-valve borne byesaid diaphragm, a vatte-barrelv formed inteceive said piston-valve, said piston-valvrvil consisting of a cylindrical shell having` anm exterior coating or" vulcanized hard rubber;-

torined upon its surface and extending over.

its upper and lower edges and forming .a

sliding tit within said liner, av plurality ot' y.

discharge openings in said piston adapted to communicate with saidV main pressure chamber, a valve-stein housing cominunicating with said auxiliary pressure chamber, a diaphragm in said valve-stem housing, an auxiliary valve in said auxiliary pressure chamber bearing a stem supportable by the said diaphragm and movable therewith, said stem being adjustablerelative to said'diaphragm and provided with channels therein, an inlet port communicating with said main and auxiliary chambers, a by-pass communieating with said valve-stein channels and loading from said auxiliary chamber to the discharge outlet, and a cushioning means within said valve-steiii housing.

4. In a iiushing valve, a housing having a main pressure chamber and a auxiliary pressure chamber, a diaphragm between said chambers, a main piston-valve borne by said diaphragm and consisting of a head having a reduced neel: forming a seat, a tapped opening in said head,'an exteriorly threaded clamp-nut adapted to tit in said opening to clamp the diaphragm against the pistonhead, a valve-barrel formed in said main pressure-chamber bearing a liner having an interior coating of vulcanized hard rubber, and said main pistou valve bearing an exterior coating'of like material and adapted to form a sliding lit within said liner.

5. In a flushing valve, ahousing having a main pressure-chamber and an auxiliary pressure chamber, a diaphragm between said chambers havingv a centrally positioned opening, a main piston-valve borne by said diaphragm and consisting of a shell having a head, saidhead having a reduced neck forming a seat, a tapped opening in said head, discharge openings formed in the Wall of said shell, an exteriorly threaded clampnut adapted vto fit in said tapped opening gral with the valve-housing and having a" liner therein having an interior coating ot vulcanized hard rubber andadapted tore-.i4

andato vreceive the diaphragm opening to clainp the same against the piston-head, said piston valvek having an exterior` coating of vulcanized material, and a valve-barrel formed in said niain pressure chamber bearing a tight fitting liner having an interior coating of like vulcanized material adapted to forni a smooth Woi'ling bore for said piston.

d 6. In a flushing valve, a main-piston valve therefor consisting of a cylindrical cast shell: having a head and reduced' neck portion forming a diaphragm seat, a tapped opening in said head, a clamp-nut havingA a threaded portion adapted to lit in said: tapped opening to clainp the diaphragm to the head., a plurality of discharge openings in the ivall of said shell positioned adjacent the head tliereoi', and said shell being provided With a smooth exterior coating of vulcanized` hai-d' rubber extending over the' upper and lower edges thereof to bind t-hesame thereto.

7.111 a iushii'ig valve, a housing having a main pressure chamber and an auxiliary 'pressure chamber, a vdiaphragm between said chambers, ar in'ainv piston'fvalve borne by said diaphragm, a valve barrel forined integral with the valve-housing and having` a tightl fitting-'liner therein provided With an interior coating'of vulcanized hard rubber and adapted to receive said piston valve, said piston-valve consisting otY a cylindrical cast shell having a head. bearing a reduced neck forming a seat, a tapped opening in said' head, discharge openings' ter-ined iii the ivall of said shell adjacent the head thereof, an exteriorly threaded clamp-nut adapted vto screw into said tapped opening and having" 

